Electric drive unit with a disconnect asssembly and method for operation of said assembly
AssigneeDana Automotive Systems Group, LLC
InventorsJeremy A. RAPP, Nathan MANDERY, Kyle MOURDOCK
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for a disconnect assembly in an electric drive unit. In one example, the system includes a dog clutch positioned in a differential, configured to selectively mechanically decouple an electric motor from one or more drive wheels, and including a first interface designed to selectively engage a second interface. In such an example, each of the first interface and the second interface include a plurality of teeth, each tooth in the plurality of teeth includes a drive flank and a coast flank, and the coast flank has a first tooth angle greater than a second tooth angle of the drive flank.
Claims20
A system for an electric drive unit, comprising:
- a dog clutch positioned in a differential, configured to selectively mechanically decouple an electric motor from one or more drive wheels, and including a first interface designed to selectively engage a second interface;
- wherein each of the first interface and the second interface include a plurality of teeth, each tooth in the plurality of teeth includes a drive flank and a coast flank, and the coast flank has a first tooth angle that is greater than a second tooth angle of the drive flank.
An electric drive unit comprising:
- a permanent magnet (PM) motor;
- a transmission mechanically coupled to the PM motor and including a differential;
- a disconnect assembly included within the differential, the disconnect assembly comprising:
- a dog clutch designed to selectively decouple the PM motor from one or more drive wheels and including a first interface designed to selectively engage a second interface, wherein the first interface includes a plurality of teeth, each tooth in the plurality of teeth includes a drive flank and a coast flank, and the coast flank has greater tooth angle than a tooth angle of the drive flank;
- and
- a solenoid coupled to the dog clutch;
- and
- a controller including instructions stored in a non-transitory memory that when executed cause the controller to:
- remove a current to the solenoid to disengage the dog clutch.
A method for operating an electric drive unit, comprising:
- disengaging a dog clutch in a disconnect device of a differential;
- wherein disengaging the dog clutch includes discontinuing a current supplied to a solenoid that is coupled to the dog clutch;
- and
- wherein the dog clutch includes a plurality of teeth, each tooth in the plurality of teeth includes a drive flank and a coast flank, and the coast flank has greater tooth angle than a tooth angle of the drive flank.
Dependencies are inferred from the claim text.